Improvement in steam-generators



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MLLER, i QF NEW- YORI-z N-'Yf f i Y `Spc'cicationfforimingpart of Letters Patent No. S3',52S,`dated October 27, 1868.

To ftll'whom it may concermil lne it .ktownihat 1,11. `un'1u-irritant,tf are city, county, and State of New York, have in- Figure `l represents a ,longitudinal vertical sectlonot this lnvention. Fig. 2 isa-{transversc section thereof, takenvin-the plane indicated byytheline new, Fig.` 1. fFig; 3 isa horizontalysectionof` thev same, thel li-ne 11i/"y, Fig. 2, indicating the plane of section. lSimilarletters indicate corresponding parts".

This invention relates to certain improve;-

ments in a steam-boiler which is4 composed ot' a series of independent pipes, placed in an inelined positioniover ithe Viire place, and made to communicate with each other and with a common steam dome, in such a manner that each pipe forms an independent Water space, which is exposed to the direct action of the fire, and from which. the steam rises into the commonr steam-dome. Y

My present improvement consists in the arrangement of heads, which communicate with each other, both in a vertical .and in a horizontal direction, and which are placed eccentrically to the center-lines of the respective pipes, in such a manner that a free circulation of the water takes place throughout the entire series of pipes, and that the water and steam, on rising from the elevated end of one of the pipes, will strike thevtop plate of the' head before being permitted to rise through the opening in the top of said head to the next head above, or to the steam dome, and that by these means the steam is disengaged from the water more readily thanit would be if the heads should be placed concentrically with the center-lines of the pipes, in which case p the water and steam issuing from the elevated end ot' a pipe rush right up together to the next succeeding head, andthe steam is not readily disengaged from the water.

Theinvention consists, further, in the arrangement of a water-jacket surrounding the inclined pipes, and connecting with the heads through openings inthe sides and tops thereof, in such a mannerthat an additional heating-surface is created, and atthe same time the water is freeto circulate through the pipes, theheads, andthe water-jacket.

s lwallsof the water-jacket, andof the heads, in `combination with the screw'- bolts passing through said brackets, in` such a manner that `the `walls-ot the Water-jacket and ofthe heads are relievedffrom Hall strain, and the circula- 1 tion of 4thewater and steam isnot obstructed.

i fArepresents the lire-grate of my boiler, to .which accessis had through the door B,"in

`the usual manner. Over this grate, and supportedin the rear by the wall C, and in front r by thecross-chamberg containing the 'dre-door,

is a series of inclined pipesfD, which are arranged in a zigzag position, as shown in Fig. 2 of the drawing, and the ends of which terminate in heads E. By placing the pipes in this position, they are better exposed to the action of the re than they are it placed in regular rows, one above the other, as heretofore.

The heads connect with each other in a horizontal direction, through holes a, and in a vertical direction through holes b, and both the holes a and b are placed eccentrically with the center-lines of the pipes, so that the water and steam discharging from the elevated end of one of the pipes will strike the top and side plates of the head before being permitted to rush out through the holes a, or up through the holes b. By these means the steam is more readily disengaged from the Water than it is it' the holes a and b are placed concentrically with the center-lines of the pipes, as heretofore; and While the water, in striking the top and side plates of the head, is checked in its direct course, the steam disen gagin g therefrom rises up through the holes b and collects in the common steam-dome.

The pipes D are surrounded by a waterjacket, F, which is composed of four distinct chambers, c d e f. The chamber c extends in front of the boiler, under the elevated ends of the pipes D, and it communicates with the lateral down the boiler. together and to the heads E by the bolts m.

To enable the bolt to throw the pressurek Y parts of the water-jacket are thus brought in communication with the pipes D, allowing the water to circulate freely throughout the entire boiler, and an additional heating-surface is provided, whereby the steam generating capacity of the boiler is materially increased.

By dividing the water-jacket in several distinct sections or chambers, I am enabled to take the same apart with great facility, and, if desired, each chamber may be constructed in one or more sections, so as to facilitate still further theoperation of putting up or taking The chambers are connected caused by the nut directly to the joint between the inner plate and the adjoining head or chamber, a brace, n, of peculiar construe vtion 1s putin between the plates.

This brace is formed by a piece of pipe, flanged on' both ends, one iiange inward, and they other outward, leaving the end leading to the head or chamber wide open for the free circulation of steam and water, and it is perforated in its sides with holes o, through which the circulation takes place.

By placing this bracket in between the plates of the chambers or heads, all the pressure caused by the nuts on the ends of the bolt is conveyed directly to the joints between the different parts, and no piece has to bear more strain than that caused by the pressure of steam, while if the bracket were omitted the stiffness of the outer plate would have to sustain and transfer the strain, which, in addition to the steam-pressure, would cause a danger of rupturing the same.

I do not claim as my invention the arrangement of heads at the ends of the pipes, such having been used heretofore; but,

Having thus described my invention, what I claim as new, and-desire to secure by Letters Patent, is

1. The heads E, provided with openings a in their sides and openings b in their tops, placed eccentrically'toward the center-lines of the pipes D, substantially as shown and described.

2. Theperforated tubularbrackets n, through which bolts'm pass, arranged, with relation to waterjacket F ,andheads E, substantially as set forth.A v

3. The waterchambers c d e f, communicating with theheads E and inclosiug the pipes D, substantially as shown and described.

T. H. MLLER.

Witnesses: Y l

W. HAUFF, ERNEs'r F. KASTENHUBER. 

